Powering the 2021 Mercedes-Benz AMG GLB 35 crossover SUV is a German built 2.0-liter turbocharged four-cylinder engine mounted transversely an driving all four wheels through a high-performance 8-speed DCT “speedshift” automatic transmission.

Code named M260 E20 DEH, this version of the engine produces 302 horsepower and 295 pound-feet of torque. It utilizes overhead camshafts with variable cam timing, 4 valves per cylinder, and has a twin-scroll turbocharger with an electronically controlled wastegate. The engine is rated by the US EPA at 21 mpg city, 26 mpg highway and 33 mpg combined.

Following the airflow, the intake charge enters through a plastic snorkel at the top of the grill and into an air filter box on the driver side of the engine compartment. From there it is drawn into the turbocharger visible at the top front of the engine.

With the high-output variation of the M260 engine air then travels across to the driver-side of the engine and through an air-to-water inter-cooler before heading to the throttle-body and intake manifold at the rear of the engine.

With the sound cover removed you can see components for the engine’s direct fuel injection with its steel fuel rail and the top of the injectors themselves. Toward the front are the coil packs for its four spark plugs.

Exhaust gases make their way out through the twin-scroll turbocharger which is shielded generously for thermal efficiency and protection of nearby components. The catalytic converter is mounted directly to it before the down-pipe and downstream exhaust components.

For service and maintenance, most serviceable components are easily located. The air filter box is up front just behind the radiator. Mounted on top of it is the engine control unit or ECU. This makes filter replacement a bit more of a time consuming process than most cars with tools needed.

Behind it is the 12-volt battery and the brake fluid reservoir is found just behind it. To also here is the secondary coolant reservoir for the inter-cooler system. Windshield washer fluid can be found next to the filter box with its bright blue cap.

The oil filler cap is found at the top of the engine without the need to remove the sound cover to fill. The oil filter is located on the rear passenger side of the engine and accessible to change from the top, not below.

Checking the oil here is a little different than most cars however as there is no conventional dipstick. To check the oil you must power up the car and read the level via the computer system service menu on the instrument cluster.

Lastly, the coolant reservoir can be inspected and filled at the passenger side of the engine compartment just adjacent to the strut tower.